During the operation of air separation equipment, enhancing the production capacity of liquid products and reducing unit energy consumption are the core objectives of improving quality and efficiency. By optimizing the refrigeration system, matching distillation conditions, and coordinating the control of front-end equipment, it is possible to effectively increase the liquefaction capacity of liquid oxygen and liquid nitrogen and reduce production unit consumption without adding new equipment.
Optimizing the refrigeration system is key to enhancing liquid production capacity. It is essential to reasonably improve the operating efficiency of the turbo expander, stabilize the optimal expansion conditions, dynamically adjust the expansion volume according to the ambient temperature and the main cold liquid level, and make up for the system's cold capacity gap. At the same time, it is necessary to strictly control the temperature difference at the hot end of the main heat exchanger, strengthen cold capacity recovery, reduce ineffective cold loss, provide sufficient cold source for air liquefaction, and improve liquefaction efficiency.
Accurately optimize the operating conditions of distillation to achieve stable production and reduce consumption. Abandon conservative operating modes, reasonably control the product purity margin within the allowable range of indicators, and avoid waste of cooling capacity caused by excessive purification. Dynamically optimize the reflux ratio and column pressure parameters, stabilize the distillation conditions of the upper and lower columns, improve the extraction rate of oxygen and nitrogen, reduce gas venting losses, and convert more effective components into liquid products.
Strengthen the collaborative regulation of front-end systems, match the air intake volume of air compressors and molecular sieve regeneration parameters as needed, and reduce the ineffective load of equipment. Through refined steady-state operation and maintenance, dynamic parameter optimization, and continuous exploration of equipment operating potential, achieve the dual benefits of increasing liquid production capacity and reducing overall energy consumption.
